Comparison Between Three Radiation Pattern Using Butler Matrix For Beamforming Network

2012 ◽  
Author(s):  
Asiti Zuraidah Ibrahim ◽  
Mohamad Kamal A.Rahim
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Patch Antenna ◽  
Monopole Antenna ◽  
Coverage Area ◽  
Butler Matrix ◽  
Multiple Beams ◽  
Pattern Characteristic ◽  
Array Beamforming ◽  
Half Power

Butler Matrix merupakan jaringan pembentuk alur (BFN), berfungsi sebagai jaringan suapan kepada tatasusun antena. Ia menghasilkan pelbagai nilai anjakan fasa progresif pada arus yang diujakan kepada antena. Dengan menyepadukan Butler Matrix bersama tatasusun antena, banyak sinaran pada corak radiasi boleh dihasilkan. Dalam kerja ini, tiga jenis tatasusun antena yang berbeza disepadukan dengan Matrik Butler dan corak radiasi untuk setiap konfigurasi dibandingkan. Antena yang dipilih dalam projek ini adalah 4 × 1 antena tampalan segi empat sama dengan suapan proximity, 4 × [4 × 2] tatasusun antena dan 4 × 1 antena eka-kutub. Ia diplih kerana setiap satu daripadanya mempunya ciri–ciri corak radiasi yang berbeza. Keputusan yang diperolehi menunjukkan empat sinaran yang berasingan dengan sudut yang berbeza dihasilkan oleh setiap tatasusun di mana antena tampalan segi empat sama mempunyai Lebarjalur Setengah Kuasa (HPBW) sebanyak 30° untuk setiap sinaran dan berjaya meliputi 120° kawasan liputan, 4 × 2 tatasusun antenna mempunyai HPBW sebanyak 7° dan meliputi 30° manakala antenna eka–kutub menghasilkan dua jenis sinaran, lebar dan sempit. Perbandingan antara pengukuran dan pengiraan corak radiasi untuk setiap tatasusun antena juga dibentangkan. Kata kunci: Antena pelbagai sinaran; 4 × 4 Matrik ; antena microstrip; tatasusun antena; jaringan pembentuk alur Butler Matrix is a beamforming network (BFN), functioning as a feeding network of antenna array. It provides multiple values of progressive phase different of excitation current to an antenna array. By integrating Butler Matrix with antenna array, multiple beams on radiation pattern could be created. In this work, three different types of antenna array have been integrated with the same Butler Matrix and the radiation patterns of each configuration have been compared. The chosen antenna types in this project are 4 × 1 proximity feed square patch antenna array, 4 × [4 × 2] antenna array and 4 × 1 monopole antenna array. They are chosen as each of them has different radiation pattern characteristic. The obtained results show that four independent beams with different angles are generated by individual array where square patch antenna array has Half Power Beamwidth (HPBW) about 30° for each beams and manage to cover 120° of coverage area, [4 × 2] antenna array has HPBW about 7° and cover 30° while monopole antenna produce two kind of beams, broader and narrower beams. The comparison between the measured and computed radiation pattern of each antenna array are presented. Key words: Multibeam antenna; 4 × 4 Butler Matrix; microstrip antenna; antenna array; beamforming network

A Comparison of Swarm-Based Optimization Algorithms in Linear Antenna Array Synthesis

2021 ◽  
Author(s):  
Ali Durmus ◽  
Rifat KURBAN ◽  
Ercan KARAKOSE
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Antenna Arrays ◽  
Heuristic Algorithms ◽  
Beam Width ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Linear Antenna ◽  
Half Power ◽  
Antenna Array Synthesis

Abstract Today, the design of antenna arrays is very important in providing effective and efficient wireless communication. The purpose of antenna array synthesis is to obtain a radiation pattern with low side lobe level (SLL) at a desired half power beam width (HPBW) in far-field. The amplitude and position values ​​of the array elements can be optimized to obtain a radiation pattern with suppressed SLLs. In this paper swarm-based meta-heuristic algorithms such as Particle Swarm Optimization (PSO), Artificial Bee Colony (ABC), Mayfly algorithm (MA) and Jellyfish Search (JS) algorithms are compared to realize optimal design of linear antenna arrays. Extensive experiments are conducted on designing 10, 16, 24 and 32-element linear arrays by determining the amplitude and positions. Experiments are repeated 30 times due to the random nature of swarm-based optimizers and statistical results show that performance of the novel algorithms, MA and JS, are better than well-known methods PSO and ABC.

scholarly journals Beam-Reconfigurable Multi-Antenna System with Beam-Combining Technology for UAV-to-Everything Communications

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 980
Author(s):  
Yu-Seong Choi ◽  
Jeong-Su Park ◽  
Wang-Sang Lee
Keyword(s):  
Power Distribution ◽  
Patch Antenna ◽  
Coplanar Waveguide ◽  
Antenna System ◽  
Monopole Antenna ◽  
Total Efficiency ◽  
Beam Combining ◽  
Low Profile ◽  
Side Beam ◽  
Half Power

This paper proposes a beam-reconfigurable antenna for unmanned aerial vehicles (UAVs) with wide beam coverage by applying beam-combining technology to multiple antennas with different beam patterns. The proposed multi-antenna system consists of a circular patch antenna and a low-profile printed meandered monopole antenna. For beam combining, a coplanar waveguide with ground (CPW-G) structure feeding network is proposed, and it consists of two input ports, a 90° hybrid coupler, a microstrip 90° phase delay line, and a single-pole double-throw (SPDT) switch. It performs the role of power distribution and phase adjustment, and synthesizes the broad-side beam of the monopole antenna and the end-fire beam of the patch antenna to form the directive broadside beams in four different directions. The proposed antenna system operates at 5–5.5 GHz which covers both UAV ground control frequencies (5.03–5.09 GHz) and UAV mission frequencies (5.091–5.150 GHz). The peak gain, total efficiency, and half-power beamwidth (HPBW) of the antenna system are approximately 5.8 dBi, 76%, 145° in the elevation plane, and 360° in the azimuth plane respectively. Its electrical size and weight are λ 0 × λ 0 × 0.21 λ 0 at 5.09 GHz and 19.2 g, respectively.

A Low-Cost 60-GHz Switched-Beam Patch Antenna Array With Butler Matrix Network

2008 ◽  
Vol 7 ◽  
pp. 432-435 ◽  
Author(s):  
Chao-Hsiung Tseng ◽  
Chih-Jung Chen ◽  
Tah-Hsiung Chu
Keyword(s):  
Antenna Array ◽  
Patch Antenna ◽  
Low Cost ◽  
60 Ghz ◽  
Butler Matrix

Coverage area enhancement of 2.4 GHz RFID system using switched beam patch antenna array

2016 ◽  
Vol 58 (8) ◽  
pp. 1945-1948
Author(s):  
Kamran Zahid ◽  
Zeeshan Zahid ◽  
Kashif Siddique
Keyword(s):  
Antenna Array ◽  
Patch Antenna ◽  
Coverage Area ◽  
Rfid System
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